Electron-discharge device



Jan. 29, 1929..

A. HADDOCK ELECTRON DI SCHARGE DEVICE Filed Nov; 20. 1.922

' wen/m? Ar) ur Haddock? y Patented Jan. 29, 19 29.

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rat-Es NEW JERSEY, ASSIGNOR T0 WESTERN ELECTRIC GOMJPANY, INCORYORATED,OF NEVt YORK, N. Y., A CORPORATION OF NEW YORK.

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Application fi1ed1q'ovember 20, 1922. Serial No. 601,954.

This inventionrelates to electron discharge devices and moreparticularly to vacuum tubes of the exterior anode type and has as itsobject to remove efliciently from the anode the excess heat generatedtherein.

This invention provides .a coolin device comprising a jacket havin meansor supporting an exterior anode e ectron discharge device withsubstantially the entire active surface of the anode exposed to thecooling fluid. The configuration of the jacket adja-- cent the inletport thereof is such as to cause a cooling fluid admitted to the jacketunder pressure to traverse a substantially helical path around theanode.

Other objects and novel features of the invention will be apparent fromthe following description andaccompanying drawing wherein Fig. 1 is anelevation partially in section of the water jacket-with an electrondischarge device therein. Fig. 2 is a plan view of the water jacket' andFig. 3 is a detail view of the lower end of the water jacket taken atright angles to the showing in Fig. 1.

A. substantially cylindrical casing 10 hav-=- traverse a helical patharound the anode 15.

ing an exterior flange 11 nearits mid point comprises a water jacketwhich is adapted to be arranged in an aperture in a frame with theflange 11 serving to support the jacket from the :traine. The open endof the water acket is interiorly threaded to receive a bushing 12'havingan angular flange 13 project'- ing inwardl at one end, the inner wall ofthe bushing eing divergent at the other end.'

The electron discharge device 14 comprises a metallic cup-shaped portion15 which serves the anode of the device and a glass portion which isfused to the flared rim of the anode. Just beyond the inner end oftheflared portion of the anode there is provided an outwardlyextendingflange 16 which comprises a closed plait formed from the metalof the anode. This plait is supported from the flange 13, there beinginterposed between the plait 16 and the flange 13, an annular gasket 17of rubber orother suitable m'ateriaL. A two-part collar 18 surrounds theanode and restson the plait 16. This collar is provided with an exteriorshoulder 19 which is engaged by the lower rim of the annular cap 20screwed on to the bushing 12.

In assembling this device; the bushing 12 is first screwed into thewater jacket and is permanently fastened in place, the threads tighteneduntil the pressure'exerted beingsealed with solder or other suitablematerial. The gasket 17 is then laid on the flange 13 and the anode15passed there- .through until the plait 16 engages the gasket.

Prior to the insertion of the anode 15 in the water jacket, theapertured cap 20 is slid over the anode. The aperture in the ca is ofsuch diameter as to pass freel over t e plait 16,

but of smaller diameter t an the diameter of the flare of the anode 15.The two portions of the collar 18 are then placed around the anoderesting on the plait 16 after which the cap 20 is screwed on thethreaded bushing and r it through the collar 18 establishsa water tightEonnection between .the' plait 16 and the an e 13.

T e water jacket is provided near its upper end with an outlet 21 and atits lower portion with an inlet 22, each ofwhich is directedsubstantially tangentialof the inner wall of the jacket. The bottom ofthe water jacket is shaped to provide a substantially helical channel 23communicating with the inlet port whereby the incoming water is causedto The passage of the water around the anode effectively wipes ofl anyair bubbles, thus prep venting localoverheating.

This type of connection between the water jacket and the anode of theelectron discharge device exposes substantially all the surface of theactive portion of the anode to the cooling fluid whereby heat may bereadily dissipated from the anode through the cooling fluid. a

The invention'clalmed 1s: 1. In combination, a cylindrical water jacket,2. bushing therefor having an inwardly projecting flange, inlet andoutlet ports in said jacket, an electron discharge device comprising 2.containing vessel having a metallic anode portion, a second flangeextending outwardly from said metallic portion and resting a containingvessel having a cup-sha ed anode with a flare at one end, a flange ajacent said flared end, an annular cap surthreaded at one end, a bushingscrewed into said jacket, said bushing having an inwardly projectingflange, an exterior anode electron dischar e device having a flangeprojecting outwardly from the anode, said anode flange being supportedfrom said first flange, a gasket interposed between said first andsecond flanges, a collar resting on said anode flange, a cap screwed onto said bushing and having a portion engaging said collar wherebypressure may be applied to establish a fluid tight connection betweensaid flanges.

In witness whereof, I hereunto subscribe my name this 17th day ofNovember A. D 1922.

ARTHUR HADDOCK.

